Thumbturn for deadbolt lock



FIG. 1 is an isometric view of an angled thumbturn showing our new design;

FIG. 2 is a left side view of FIG. 1; and

FIG. 3 is a back view of FIG. 1;

FIG. 4 is a right side view of FIG. 1; and

FIG. 5 is a top view of FIG. 1; and,

FIG. 6 is a bottom view of FIG. 1.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a thumbturn for deadbolt lock, as shown and described. 